NoteAway - NoteAway is the simplest, most convenient way to take quick notes on OS X.
Personal Notes File - Personal Notes File - Personal Notes File Version 02.01 (Download)
JustNotepad.com - A free online notepad allows you to create any text or notes in your web browser.
Simplenote - The simplest way to keep notes. Light, clean, and free. Simplenote is now available for iOS, Android, Mac, and the web.
TakeNote - A web-based note-taking app with GitHub sync and Markdown support.
Personal Knowbase - Can't find your critical notes when you need them?